improve image loading for thumbsContainer.js: fix for reorder(), retries for failed loading, change constants
improve image loading for thumbsContainer.js: fix for reorder(), retries for failed loading, change constants

Leonid-SPB/MovePhotosVk,Leonid-SPB/MovePhotosVk,Leonid-SPB/MovePhotosApp,Leonid-SPB/MovePhotosApp,Leonid-SPB/MovePhotosVk,Leonid-SPB/MovePhotosApp